N,N-Dimethyl-1,3-propanediamine → HCID 21451015, compound

Participants

Reaction Steps

To a solution of 9.2 g of 3-dimethylaminopropylamine in 50 ml of tetrahydrofuran is added 7.8 g of 1-chlorocarbonyl-5-o-chlorophenyl-7-ethyl-2,3-dihydro-1H-thieno[2,3-e][1,4]diazepine hydrochloride by portions with cooling and stirring. After the mixture is reacted for two and half hours at room temperature, the reaction substance is poured into 200 ml of ice-cold water and extracted with ethyl acetate. The organic layer is washed with water and dried over anhydrous sodium sulfate and then the solvent is evaporated under reduced pressure. The residue is treated with ethanolic hydrogen chloride to give 5-o-chlorophenyl-7-ethyl-1-(3-dimethylaminopropylcarbamoyl)-2,3-dihydro-1H-thieno[2,3-e][1,4]diazepine dihydrochloride as yellow crystals. This product, when recrystallized from a mixture of methanol and ethyl acetate, melts at 223°-224° C with decomposition.

Provenance & Evidence